malcontent

1. N-COUNT You can describe people as malcontents when you disapprove of the fact that they are dissatisfied with a situation and want it to change. 不满者[正式] [usu pl]

Five years ago a band of malcontents, mainly half-educated radicals, seized power. 五年前，一群以文化程度不高的激进分子为主的不满者掌握了实权。